FLORIDA GEOLOGICAL SURVEY. 
FIFTH ANNUAL REPORT. PL. 8. 
Fig. 1.—Phosphate washer for hard rock phosphate, Cummer Phosphate 
Company, Alachua County. 
Fig. 2 .—Drill for prospecting for hard rock phosphate, in use by the 
Southern Phosphate Development Company. The prospect holes are drilled 
through the phosphate formation to the underlying formation, the Vicksburg 
Limestone, which is reached at this locality at a depth of 75 to 100 feet. 
